my @emptyfiles = grep { /\d/ } grep { -f } glob '*';

Why two greps?

I don't think it makes a big difference for a small set of files, but this solution runs through two loops (implicitly in grep) where one loop is sufficient:

my @files = grep { -f && /\d/ } glob '*';

Also, -f hides a system call (stat), which is quite expensive. Swapping the order avoids the system call for all directory entires whose names do not match the regular expression:

my @files = grep { /\d/ && -f } glob '*';

Or, if you want to keep the two greps:

my @files = grep { -f } grep { /\d/ } glob '*';

Alexander

--
Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^2: create array of empty files and then match filenames by afoken
in thread create array of empty files and then match filenames by angela2

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